10 reasons why the Lithium Polymer Battery swelling

We often see a lot of people on the forum talking about the problem of Polymer Lithium Battery swelling. Lithium battery puffy is a comment phenomenon. The reason for battery swelling is related to many factors. Such as production process, use method, use environment, and so on.
Let us give you an analysis of the reasons why a Lithium Polymer graphene battery will swell:
(1)  Poor encapsulation: Top sealing, Side sealing, and Degassing, poor encapsulation on either side can cause the Lipo battery cells to swell. Poor encapsulation will cause moisture in the air into the Lipo battery cell inside, which causes the electrolyte to break down and produce gas. But at present, the poor encapsulation causes the battery cell puffy rate has be greatly reduced.
(2)  The moisture content inside the lipo battery cell exceeds the standard: There is a certain requirement for moisture content in the battery cell. Once the moisture content exceeds the standard, the electrolyte will fail, thus producing gas after the degassing.
(3)  Abnormal vacuum extraction: Abnormal vacuum extraction due to system or machine reasons. The heat radiation area of the vacuum seal is too large, so the air-extraction bayonet can't penetrate the pocket effectively, and the air-extraction is not clean.
(4)  Corrosion: Polymer Lithium Battery Cell Corrosion, the aluminum layer consumed by the reaction, loss of water barrier role, so the battery swelling.
(5)  Pocket surface damage: the surface of the pocket is punctured by external forces, causing moisture to enter the Lithium battery cell. And the chemical properties of lithium are so reactive that they can be extremely dangerous. When the lithium metal is exposed to air, it reacts violently with Oxygen.
(6)  Angular breakage: Because of the special deformation of the aluminum at the folding angle, the shaking of the pocket will distort the angle and lead to the damage of Al (The larger the battery cell, the larger the pocket, the more easily damaged), loss of water barrier role.
(7)  External Collision: Aluminum is easily deformed. The larger the battery cell, the larger the pocket, the more easily damaged.
(8)  External Short Circuit: As a result of operating errors, lead to positive and negative contact lead to a short circuit. Polymer lithium-ion batteries will swell and the voltage drops rapidly, even emitting smoke.
(9)  Internal short circuit: design problem, Shrinkage of isolation membrane, crimp, Breakage, Bi-cell Dislocation, the burrs piercing the isolation membrane, too much pressure on the clamp, and over-extrusion of the edge ironing machine, these reasons will cause an internal short circuit.
(10)  Over-charging, over-discharging: Polymer Lithium battery is overcharged or overcharged, plus the protective plate abnormally, which causes a lot of gas in the battery cells.
How to solve the problem of Polymer Lithium Battery puffy?
(1) Lithium Battery Manufacturers must strictly control the production process.
(2) During charging the battery, the user should avoid overcharging and protect the battery from harm.
(3) Users must stop using the lithium battery after they find that the battery is swelling.
(4) Lithium Polymer battery swelling is already a symptom of a larger problem.
(5) Lithium batteries have strict requirements for chargers. Be sure to use a special charger for Lithium Batteries. If the charger used does not meet the requirements, at least the Polymer Lithium Battery will swell, at worst, a safety accident will happen, or even the possibility of explosion.
When your battery swells, you can talk to the manufacturer about compensation. Usually, the battery supplier will ask you to provide the following information.
1. Are there any of the following undesirable phenomena?
(1) Does the battery have the phenomenon of zero voltage?
a. Carefully check the appearance of the battery, and see if there are some situations like fall, crush, puncture, and so on.
b. What is the storage temperature of the Lipo battery when it is not in use? Does it have high-temperature storage (≥40 °C)?
(2) Does one or more of the cells exhibit high voltage (single cell voltage ≥4.25 v)? If so, the Lipo battery supplier will need you to confirm the following information:
a. Please confirm if the plug of the battery is welded by the user himself. Is there a false weld? Virtual welding is a common line fault, usually caused due to improper production process in the production process.
b. Is the Lithium battery fully charged when it is not in use (single cell voltage ≥4.0 v)? Is the storage time longer than 7 days?
2. How exactly do you use the battery?
(1) Do you use more current than the lipo battery can handle when using it?
(2) Do you continue to discharge at a high current when the lipo battery is at low voltage (≤3.7 v)?
3. Besides, you will need to provide the following information:
(1) The QR code for the lipo battery cell.
(2) The number of times you used the lipo battery.
(3) How long has the graphene battery been on hold?
(4) Measure the voltage of the graphene lipo battery after it has been used and left for 10 minutes (whole battery pack and single cell).
With the development of Polymer Lithium Battery Technology, the phenomenon that the battery will swell during use is becoming less and less, which is a probability problem. Lithium battery selling is a very common problem, when we meet such a situation, the best solution is to replace the new battery.
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